Honda Civic Service Manual page 1178

Master Cylinder/Brake Booster
Pushrod Glearance Adjustment
NOTEr
. T h e m a s t e r c y l i n d e r p u s h r o d - t o - p i s t o n c l e a r a n c e
must be checked and adjustments made, if neces_
sary, before installing the master cylinder.
. ABS type is shown, conventional brake type is similar.
1. Set the special tool on the master cylinde. body; push
in the center shaft until the top of it contacts the end
ofthe secondary piston by turning the adjusting nut.
Without disturbing the center shaft's Dosition, install
the specialtool upside down on the booster.
Install the master cylinder nuts, and tighten to the
specified torque.
Connect the booster in-line with a vacuum gauge O _
101 kPa (0 - 760 mmHg, 30 in.Hg) to the booster,s
e n g i n e v a c u u m s u p p l y , a n d m a i n t a i n a n e n g i n e
speed that will deliver 66 kpa (500 mmHg, 20 in.Hg)
vacuum.
With a feeler gauge. measure the clearance Detween
the gauge body and the adjusting nut as shown.
Clearance: 0 - 0.4 mm {0 - 0.02 in)
VACUUM GAUGE
(Comm€rcially availeblel
0 - 101 kPa
{0 - 760 mm Hg, 30 in.Hg)
AOJUSTING NUT
FEELER GAUGE
19-22
1 0 .
N O T E : l f t h e c l e a r a n c e b e t w e e n t h e g a u g e b o d y
and adjusting nut is 0.4 mm (0.02 in), the pushrod-
to-piston clearance is 0 mm. However, if the clear_
ance between the gauge body and adjusting nut is
0 mm, the pushrod-to-piston clearance is 0.4 mm
(0.02 in) or more. Therefore, it must be adjusted and
rechecked.
6. lf clearance is incorrect, loosen the star locknut, and
turn the adjuster in or out to adjust.
NOTE;
. Adjust the clearance while the specified vacuum
is applied to the booster.
. Hold the clevis while adjusting.
Tighten the star locknut securely.
Remove the special tool.
0 - 0.4 mm (0 - 0.02 in)
7 .
ADJUSTER
PUSHROD
ADJUSTMENT GAUGE
07JAG - SD('1(x)
9. Adjust the pushrod length as shown if the booster
rs removed.
STAR LOCKNUT
22 N.m
{2.2 kg,f.m, 16lbtft)
1 1 6 1 0 . 5 m m
{{.571 0.02 in)
PUSHROD
LOCKNUT
15 N.m 11.5 kgf.m, 11 tbtftl
Install the master cylinder {see page l9-21).